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4 years ago

Explain how resistance affects current in a circuit.

1 answer:

3 0

Ohm's law defines the relationship between the voltage, current, and resistance in an electric circuit: i = v/r. The current is directly proportional to the voltage and inversely proportional to the resistance.

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The heat capacity of water is 1cal degree'g1 (1 calorie per degree centigrade, per gram). You are given 1 gallon of water at 25

sdas [7]

Answer:

The heat needed to boil 1 gallon of water is 81,490.62 Joules.

Explanation:

$Q=mc\Delta T$

Where:

Q = heat absorbed or heat lost

c = specific heat of substance

m = Mass of the substance

ΔT = change in temperature of the substance

We have :

Volume of water = V = 1 gal = 4546.09 mL

Density of water , d= 1 g/mL

mass of water = m = d × V = 1g/mL × 4546.09 mL = 4546.09 g

Specific heat of water = c = 1 Cal/g°C

ΔT = 100°C - 25°C = 75 °C

9 (boiling pint of water is 100°C)

Heat absorbed by the water to make it boil:

$Q= 4546.09 g\times 1 Cal/g^oC\times 75^oC=340,956.75 Cal$

1 calorie = 4.184 J

$Q=\frac{340,956.75}{4.184} J = 81,490.62 J$

The heat needed to boil 1 gallon of water is 81,490.62 Joules.

5 0

3 years ago

What is a committee called that is organized whenever the two house of congress diffrent versions of the same bill?

Mashutka [201]

The correct answer is Conference committee.

8 0

4 years ago

How many moles of pcl5 can be produced from 23.0 g of p4 (and excess cl2)? express your answer to three significant figures and

NeX [460]

Balance Chemical equation is,

P₄ + 10 Cl₂ → 4 PCl₅

According to Balance Equation,

123.89 g (1 mole) of P₄ reacts to produce = 4 Moles of PCl₅
Then,
23 g of P₄ will react with excess Cl₂ to produce = X moles of PCl₅

Solving for X,
X = (4 mol × 23 g) ÷ 123.89 g

X = 0.742 g of PCl₅
Result:
When 23 g of P₄ is reacted with excess Cl₂, 0.742 g of PCl₅ is produced.

4 0

4 years ago

A 1.900 g sample of C6H12 is burned in an excess of oxygen. What mass of C)2 and H20 should be obtained

Alexeev081 [22]

The balanced chemical reaction is:

C6H12 + 9O2 = 6CO2 + 6H2O

We are given the amount of C6H12 to be used for the reaction. THis will be the starting point for the calculations.

1.900 g C6H12 ( 1 mol C6H12/ 84.18 g C6H12) ( 6 mol CO2 / 1 mol C6H12) (44.01 g /mol ) = 5.96 g CO2
1.900 g C6H12 ( 1 mol C6H12/ 84.18 g C6H12) ( 6 mol H2O / 1 mol C6H12) (18.02 g /mol ) = 2.44 g H2O

6 0

3 years ago

What happens when you increase the salinity

Tpy6a [65]

Answer:

There are parts of the ocean where hardly any rain falls but warm dry winds cause lots of evaporation. This evaporation removes water – when water vapour rises into the atmosphere, it leaves the salt behind, so the salinity of the seawater increases. This causes the seawater to become denser.

4 0

3 years ago